$allPackGoods = array(

['id'=>1,'stock'=>14,'num'=>6],

['id'=>2,'stock'=>20,'num'=>6],

['id'=>3,'stock'=>20,'num'=>6],

['id'=>4,'stock'=>18,'num'=>6],

['id'=>5,'stock'=>54,'num'=>6]

);

按照件数去生成数组直到把库存都清空掉

最终结果类似

[[{"id":1,"stock":8,"num":6,"use":6},{"id":2,"stock":14,"num":6,"use":6},{"id":3,"stock":14,"num":6,"use":6}],[{"id":1,"stock":2,"num":6,"use":6},{"id":2,"stock":2,"num":6,"use":6},{"id":4,"stock":12,"num":6,"use":6}]]

但是组合里面不能有相同的id，代码应该如何实现？在线等，求大神解救